Deformable chair



Nov. 4, 1930. M. FuJlTA DEFORMABLE CHAIR Filed Sept. 13I 1928 3 Sheets-Sheet l Nov. 4, 1930. M. FUJITA DEFORMABLE CHAIR Filed Sept. 15, 1928 3 Sheets-Sheet 2 Nov. 4, 1930. M. FUJITA DEFORMABLE CHAIR Filed Sept. 13l 1928 5 Sheets-'Sheet 3 According to thel invention the main parts two units.

35 f Figure 3 is a side elevation ofthe seating ably disposed lever. connections18. this seat proper beingshown fin elevation and Patented Nov. 4, 1930 i, l,

* kUNITED STATESV PATENT. :OFFICE -f i 'Y i y i MASA'UJITA, or 'SAEM-euri,"FKUIJAPAN i DEFORMABIQE 'cnam p Y y p v Apliiieauoii inea sueptembeigiaiees. sensitiva 305,639. M y The invention relates Ato improvements in rotatedditl'erentially to enable unobstructed deformable chairs, particularly Vthose em# examination of the back of the patient,

ployed in connection withmedical examina- Figure 8 lis a diagram explaining the mos tion/ of 'the link mechanism connecting `the of tliedeforinabl'e chair lconsist of a'scating Referring nioreparticularly to the numerunit upon which a patient may sit with his alsof reference' on the drawings, 1 is the seat orlier feetresting upon the foot'rest, the legs proper of the deformable chair. Solidlyfat depending along the leg support, anda lean.- tached to the seat 1` is laveitical shaft 2,by ing unit against which the patient may rest means of which the seat isfrotatablymounted *60 his or her back. Theseatingand kthe leaning' on a pedestalB, resting ona ball bearing 4. units are operably connected by means 'of a The seat proper is not entirely circular but transmission gear on the one hand and by is enlarged laterally, as y`atf5,` at the front ,means of a'link mechanism on the other hand part thereof to forni a rectilinear edge, at in sucha manner thatthe ysitting and the leanwhich `part the yleg support 6 is hinged, as` at G5 `ing units maybe rotated differentially, or the 7. At the lower end ofthe leg support, a foot whole device may assume a collapsed lying rest 8 is hinged as at9., The seat proper 1 position. vThe linkmechanism is ,constructed the leg'support'4 and tliefjfoot rest 8 con# -V in such a *wayv that it does ynot obstruct the stitutesthe seating *unit of thefchair.k j fr-eerotation of theseating'and the leaning Rotatably mountedoii the'pedestal 3 iis' a 70 units. c :f i s covering'dis'c 10, towhich is hinged, as'at Vith the aid of iny'inventiomit'willk be 11,jthe chair backf 12. v"The,ch'airfbaclr 12 possible to interconnect the seatin and-the in combinationwith `thecovering .disc llO leaning units in such "a ,manner .t jat when constitute the leaning'unitfof' the chair. a the body of the patient, together with the Yvlith a viewto adjust the back 11 toany seating unitinan upright position, is rotated desired inclination) in "regardfto the seat through 180, the chair back twill rotate proper whichis always in yparallel* relation to through half that amount',- exposing thehack the covering disc',y the latter is formed with a ofthe patient for unobstructed examination.. toothed arcuate or curved k.portion 13 on 39 -ln the accompanying drawings, which whichengages a pawl 14 'which is suitably 99 show one embodiment'of the invention: pivoted on :the control casing 15 provided vat Figure 1 is'aside elevation, part of the conthe reargfside of the chair .back vand acted trol casing beingbroken away, y upon bya spring 16. j The pawl 14 maybe Figure 2'is a plan thereof, controlledbyithe handlev 17 through a suitlap'sed lying position", a part of the pedestal be Vfled f ,being'fbroiaa may," L i TO @HOW/.i thiles Support s6 and the f90# Figure 4 isa bottom view thereof, the con- 1" est 8 llfconformltyanfl 1n .CQPefltlOIl Wlth t trol CaSsngbing-partly Broken away, the chair back,l the ,casing 15 1s extended `to yFigure is an elevation, oneV somewhat en-` formi-ai bar a? die sesnd of* Wind?. one en@ sssssssssss, sssss sssssssssss starai; rientra tratar necting the seating, and the leaning units, the pedesta 3 -a-lndliss)fouml4 atfthe Othel? end with a semiscircular horizontal groove 22, in 95 which slidablysengages the end of a horizontal a l s arm of abent-lever 23 which is'pivotedat the Figure G lSe'Plfsm ef the @rammelen sears extremity 24- fsi bracket 25 rigidiyaaached 1 Figure 7 is a bottom plan ofthe Chair when t0' the leg support 6j' "lhefotherl endv'26' of andthe leaningunits 'as eXtendedto afcolmeans the inclination 'of thechair bac-khan pms being ShOWff 'irverticsil section on .line

the seating andthe leaning units have been the bent lever 23 is Connected .to a commen me ing rod 27, the other end 28 of which is in turn connected to a bracket 29 rigidly attached to the foot rest 8.

In the link connection, the hinge points 2O and 24 of the link 21 and the bent lever 23 respectively form, together with the hinge points 7 and 11 of the leg support and the chair `back respectively, a parallelogram (Fig. 9). Also the hinge points 24, 26, 28 and 9 form a parallelogram. Therefore, the link 21, together wththe arm of the bent lever 23 engaging therewith, always moves horizontally, and consequently the foot rest 8 will always assume aI horizontal position regardless of whether the chair is in an upright position shown in Figure 1 or in a collapsedposition shown in Figure 4 or in any intermediate position. Y

vWithin the covering disc 10 underneath the `seat 1 and keyed to the vertical shaft 2 of the .seat is a lgear wheel 30. .This gear wheel 30 is operably connected with an annular gear wheel or ring gear 31 through the intermediary of two pairs of intermeshing pinions 32, 33 provided on an arm 34 fixed to the pedestal3. The ring gear 31 has along the louter circumference thereof a series or" notches 35, so thatit also constitutes a ratchet wheel to cooperate with a coupling pawl 36 pivoted tothe covering disc 10. The coupling pawl 36 may be controlled by means of a handle 37 and a lever 38. y, Y j

When the lcoupling pawl 36 is caused to en- Y gage one of the notches `35, the seating unit is brought into operating engagement with the leaning unit, so that when either `one of the two units, the seating `unit for-example, is rotated 180o in either direction, the leaning unit will rotate in the same direction through haltthat amount, or 900, so thatif the patient, after his orher breast has been.y ined ata position of the .chair shownin Figure 1,Qis turned through v1803, the parts will assume the position shown in Figurer?, exposing the patients back tor unobstructed examination. K

If the coupling pawl is caused `to engage with one of the indentations v39 (Figure)V formed in the underside of the seat 1 along the periphery thereof, the seating and the leaning units will be simply connected to eachother and the two will rotate together as a whole on the pedestal. If the coupling pawl is brought to an intermediate neutral position engaging with neither the seat 1 nor the annular wheel 31, t-he two units will be entirely free'to rotate independently of each other. I

/Vith the objectot holding the depending parts 6 and 8 firmly in theuprightnpositionfof the chair,'1 have Aprovided a pair of brackets40 fixed to the seat proper 1 adja cent the hinge points 7 41 is apillow for the head'of the patient to lean on.

What I claim is:

1. A chair comprising a pedestal; a unit rotatably mounted on the pedestal and including a seat, a leg support and a foot rest; a second unit rotatably mounted on the pedestal and including a chair back; and a set tatably mounted on the pedestal, a leg support hinged to the seat, a foot rest hinged to the leg support, a disc-like member rotatably mounted on the pedestal, a chair back hingedtothe disc-like member, a link conf nection between :the chair back and the leg support and the foot rest, and means to control the inclination of the chair back, the leg support and the foot rest simultaneously,rel atively to the seat; the vsaid link connection comprising an oblong elliptical member encirclingthe pedestal. A

3. chair comprising a pedestal, a seat rotatably mounted on the pedestal, a leg support hinged to the seat, a foot rest hinged to thek leg support, a discflike member rotatably mounted on the pedestal, a lchair back hinged to the disc-like member, means for operably connecting the disc-like member with the seat, a link connectionV between the chair back and the leg support and foot rest, and means to control the inclinationof the chair back, the leg support andthe foot rest simultaneously, relatively to the seat; the said link connection comprising an oblong elliptical member encircling the pedestal, and a bent lever Vhaving one armthereof engaged with the said elliptical member and the other arm engaged with a connecting. rod connected to a bracket fixed to the foot rest. Y 4. A chair, comprising apedestal; a unit rotatably mountedon the pedestal and consisting of aseat, a leg Ysupport VandaV foot rest; aichair back having a separate rotatable mounting on the pedestal forrrotation independently kof and relativelyto said seat unit; and means for operatively connecting said chair back and seat unit together to transmit the movement of either element to the other. 5. A chair, according to claim 4, in which the means for connecting together-the chair back and theunit including thek seat comprises an annular memberv provided with a peripheral series of notches, a connection between said member and one ofthe two elements to' be rotated, and a pawl for interchangeable engagement in said notches carried by theother element.

Y 6. chair, accordingtoV claim 1, in which the set of intermeshing gears comprises a gear l'ixed'to the seat, an annulargear encircling the seat gear, and a pair/ofintermediate gears meshing with.4 each other and with the seat gear and annular'gear, thereby to oblili) tain a dierential movement as between the seat and the chair back.

7 .'A chair, comprising a pedestal; avunit rotatably mounted thereon and consisting of a seat, a leg supportand a Jfoot rest; a second iunit rotatably mounted on the pedestal and including a chair back; and differential gearing operably connecting the two units to obtain a differential movement as between the m seat and the chair back.

' 8. A chair, comprising a pedestal; a seat rotatably mounted thereon; a leg support hinged to the seat; a covering disc rotatably mounted on the pedestal below said seat; a

chair back hingedto said seat; and a linkY connection between the chair back and the leg support embodying'an oblong elliptical member encircling the pedestal. p

9; A chair, comprising a pedestal; a seat rotatably mounted thereon; apleg support hinged to the seat; a covering disc rotatably mounted on the pedestal below said seat; a chaifrback hinged to said seat; and a gear connection between the seat and the covering disc and its associated chair back for obtaining a diiferential rotary movement between said seat and back. Y

e l0. A chair, comprising a pedestal; a seat rotatably mountedthereon and having a leg 3o support associated with it; a covering disc rotatably mounted on the pedestal below said seat; a chair back attached to said seat; a gear fixed to said seat; a loose annular gear encircling the first gear; intermediate gears 3,; carried by the pedestal in mesh with each other and with the rst gear and the annular gear; and a device for releasably coupling said annular gear to said disc.

11. A ychair according to claim l0, in which 4f, the annular gear is provided with a peripheral series of notches; and in which the coupling vdevice comprisesV a pawl pivoted to the f disc and engageable in saidy notches.

In testimony whereof I aiX my signature.

y l MASA FUJITA. 

